Maybe contract language that says:

You may opt out of profit sharing for 15/10/5/5 or retain profit sharing and you get a part of the larger pie left by those who opted out. Win/win. No need for discourse or complaining because of self determination.

Oops. Sorry! My bad, colored outside the lines...

I will try to confine my thinking to the inside of the box. Darn now I lost my street cred. I guess I will have to stick to the facts and reference my data when I post online!